Virtual Valve Museum

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CV2904 CRT

Size This CRT measures 500x185mm overall and has an octal base

This is a magnetic focus and deflection CRT with a flat face. The screen is described as OO9 (Orange/Orange/very long persistence) with an aluminium backing. The prototype is C211Q/X2.

Heater voltage 6.3V
Heater current 600mA
Max anode voltage 18kV
Max heater-cathode voltage 265V
Cc - all (max) 8pF
Cg - all (max) 12pF


Pin Function
1 n/c
2 Heater
3 No pin
4 No pin
5 Grid
6 No pin
7 Heater
8 Cathode
SC Anode

The EVS data for this CRT states the fluorite coating must not contain beryllium. The neck was to be coated with Acheson Dag no. 490 and two coats of Bakelite varnish V130/1.



Quarter view FLat face

This CRT came packed in a box whose label indicates it was sent to HMS Collingwood in 1972.